Structure-guided engineering of biased-agonism in the human niacin receptor via single amino acid substitution
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: March 2, 2024
Abstract
The
Hydroxycarboxylic
acid
receptor
2
(HCA2),
also
known
as
the
niacin
or
GPR109A,
is
a
prototypical
GPCR
that
plays
central
role
in
inhibition
of
lipolytic
and
atherogenic
activities.
Its
activation
results
vasodilation
linked
to
side-effect
flushing
associated
with
dyslipidemia
drugs
such
niacin.
GPR109A
continues
be
target
for
developing
potential
therapeutics
minimized
response.
Here,
we
present
cryo-EM
structures
complex
drugs,
acipimox,
non-flushing
agonists,
MK6892
GSK256073,
recently
approved
psoriasis
drug,
monomethyl
fumarate
(MMF).
These
elucidate
binding
mechanism
molecular
basis
activation,
insights
into
biased
signaling
elicited
by
some
agonists.
structural
framework
allows
us
engineer
mutants
exhibit
G-protein
bias,
therefore,
our
study
may
help
structure-guided
drug
discovery
efforts
targeting
this
receptor.
Language: Английский
Insights into the Activation Mechanism of HCA1, HCA2, and HCA3
Journal of Medicinal Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Hydroxy-carboxylic
acid
receptors
HCA1,
HCA2,
and
HCA3
can
be
activated
by
important
intermediates
of
energy
metabolism.
Despite
the
research
focusing
on
its
clinical
application
has
been
limited
adverse
effects.
Therefore,
role
HCA1
as
a
promising
target
for
treatment
lipolysis
warrants
further
exploration.
As
HCAs
exhibit
high
similarity
when
with
diverse
selective
agonists,
conserved
yet
unique
activation
mechanism
remains
undisclosed.
Herein,
we
unveil
cryo-electron
microscopy
structures
3,5-DHBA-HCA1-Gi
signaling
complex,
acifran-
MK6892-bound
HCA2-Gi
complexes,
acifran-HCA3-Gi
complex.
Comparative
analysis
across
reveals
key
residues
in
contributing
to
stabilization
ligand-binding
pocket.
Furthermore,
chimeric
complexes
mutational
analyses
identify
that
are
pivotal
HCA2
selectivity.
Our
findings
elucidate
critical
structural
insights
into
mechanisms
ligand
recognition
within
broaden
our
comprehension
specificity
binding
HCA
family.
Language: Английский
Structures of G-protein coupled receptor HCAR1 in complex with Gi1 protein reveal the mechanistic basis for ligand recognition and agonist selectivity
Xin Pan,
No information about this author
Fang Ye,
No information about this author
Peiruo Ning
No information about this author
et al.
PLoS Biology,
Journal Year:
2025,
Volume and Issue:
23(4), P. e3003126 - e3003126
Published: April 15, 2025
Hydroxycarboxylic
acid
receptor
1
(HCAR1),
also
known
as
lactate
or
GPR81,
is
a
class
A
G-protein-coupled
with
key
roles
in
regulating
lipid
metabolism,
neuroprotection,
angiogenesis,
cardiovascular
function,
and
inflammatory
response
humans.
HCAR1
highly
expressed
numerous
types
of
cancer
cells,
where
it
participates
controlling
cell
metabolism
defense
mechanisms,
rendering
an
appealing
target
for
therapy.
However,
the
molecular
basis
HCAR1-mediated
signaling
remains
poorly
understood.
Here,
we
report
four
cryo-EM
structures
human
HCAR2
complex
Gi1
protein,
which
binds
to
subtype-specific
agonist
CHBA
(3.16
Å)
apo
form
(3.36
Å),
agonists
MK-1903
(2.68
SCH900271
(3.06
Å).
Combined
mutagenesis
cellular
functional
assays,
elucidate
mechanisms
underlying
ligand
recognition,
activation,
G
protein
coupling
HCAR1.
More
importantly,
residues
that
determine
selectivity
between
are
clarified.
On
this
basis,
further
summarize
structural
features
match
orthosteric
pockets
HCAR2.
These
insights
anticipated
greatly
accelerate
development
novel
HCAR1-targeted
drugs,
offering
promising
avenue
treatment
various
diseases.
Language: Английский
Multiple recent HCAR2 structures demonstrate a highly dynamic ligand binding and G protein activation mode
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: June 25, 2024
Abstract
A
surprisingly
clear
picture
of
the
allosteric
mechanism
connecting
G
protein-coupled
receptor
agonists
with
protein
binding—and
back
–
is
revealed
by
a
puzzle
thirty
novel
3D
structures
hydroxycarboxylic
acid
2
(HCAR2)
in
complex
eight
different
orthosteric
and
single
agonist.
HCAR2
sensor
β-hydroxybutyrate,
niacin
certain
anti-inflammatory
drugs.
Surprisingly,
without
on-target
side
effects
bound
very
similarly
completely
occluded
binding
site.
Thus,
despite
many
we
are
still
left
pertinent
need
to
understand
molecular
dynamics
this
similar
systems.
Language: Английский
Association between dietary intake of niacin and stroke in the US residents: evidence from national health and nutrition examination survey (NHANES) 1999–2018
Jie-Yu Qiu,
No information about this author
Wenhui Zhang,
No information about this author
Zhu Xiao-ming
No information about this author
et al.
Frontiers in Nutrition,
Journal Year:
2024,
Volume and Issue:
11
Published: July 19, 2024
Objective
This
study
aims
to
explore
the
association
between
niacin
intake
and
stroke
within
a
diverse,
multi-ethnic
population.
Methods
A
stringent
set
of
inclusion
exclusion
criteria
led
enrollment
39,721
participants
from
National
Health
Nutrition
Examination
Survey
(NHANES).
Two
interviews
were
conducted
recall
dietary
intake,
USDA’s
Food
Nutrient
Database
for
Dietary
Studies
(FNDDS)
was
utilized
calculate
based
on
results.
Weighted
multivariate
logistic
regression
employed
examine
correlation
stroke,
with
simultaneous
exploration
potential
nonlinear
relationships
using
restricted
cubic
spline
(RCS)
regression.
Results
comprehensive
analysis
baseline
data
revealed
that
patients
history
had
lower
levels.
Both
RCS
indicated
negative
stroke.
The
dose-response
relationship
exhibited
non-linear
pattern
range
intake.
Prior
inflection
point
(21.8
mg)
in
risk,
there
exists
marked
decline
risk
as
increases.
Following
point,
deceleration
decreasing
trend
increasing
becomes
evident.
points
exhibit
variations
across
diverse
populations.
Conclusion
investigation
establishes
broader
American
Language: Английский
Ligand recognition and activation mechanism of the alicarboxylic acid receptors
Yanru Liu,
No information about this author
Ziwei Zhou,
No information about this author
Fenghui Guan
No information about this author
et al.
Journal of Molecular Biology,
Journal Year:
2024,
Volume and Issue:
unknown, P. 168795 - 168795
Published: Sept. 1, 2024
Language: Английский
Management of blood lipids in post-kidney transplant patients: a systematic review and network meta-analysis
Bohan Luo,
No information about this author
Shan Zhong,
No information about this author
Xiaoxiao Wang
No information about this author
et al.
Frontiers in Pharmacology,
Journal Year:
2024,
Volume and Issue:
15
Published: Oct. 8, 2024
Introduction
The
primary
objective
of
this
systematic
review
was
to
provide
an
overview
the
efficacy
and
safety
various
lipid-lowering
therapies
in
patients
post-kidney
transplant
(PKT),
given
limited
existing
literature.
Considering
restricted
number
available
studies,
work
aimed
summarize
evidence
regarding
effectiveness
different
treatments
PKT
patients.
effects
therapeutic
regimens
on
lipid
levels
were
compared,
their
assessed,
with
heterogeneity
treatment
protocols
acknowledged.
Material
Methods
Randomized
controlled
trials
investigating
(DTRs)
for
regulating
systematically
retrieved
from
PubMed,
Cochrane
Library,
Embase,
inception
March
2024.
Literature
quality
assessed
employing
risk
bias
assessment
tool.
Data
analysis
graphical
representation
performed
RevMan5.3
Stata
20.0
.
surface
under
cumulative
ranking
area
(SUCRA)
compared
DTRs
profiles,
incidence
adverse
events,
all-cause
mortality
Results
Fifteen
studies
included,
comprising
5,768
involving
9
regimens.
results
revealed
that,
changes
high-density
lipoprotein
cholesterol
(HDL-C),
SUCRA
rankings
highest
lowest
among
receiving
statins
+
ezetimibe
(70%),
placebo
(61.5%),
fibrates
(57.2%),
(44.1%),
fish
oil
(17.3%).
Regarding
low-DL-C
(LDL-C),
(68.2%),
(67.5%),
(53.4%),
(34.5%),
(26.5%).
For
change
total
(TC)
levels,
a
network
meta-analysis
(NMA)
that
DTRs,
TC
(97.6%),
proprotein
convertase
subtilisin/kexin
type
inhibitors
(PCSK9
inhibitors)
(74.3%),
(64.3%),
(61.6%),
(47.2%),
(31.6%),
calcineurin
phosphatase
(11.9%),
immunosuppressants
(11.4%).
triglyceride
(TG)
NMA
showed
TG
(99.9%),
(68.9%),
PCSK9
(66.6%),
(55.1%),
(49.2%),
(45.0%),
(7.8%),
(7.6%).
occurrence
kidney
failure,
reducing
failure
(69.0%),
(63.0%),
steroids
(51.8%),
(27.1%),
(22.5%).
mortality,
(90.5%),
(55.8%),
(3.7%).
Conclusion
In
patients,
combination
therapy
demonstrated
notable
advantages
higher
effectiveness.
exhibited
greater
events
rates
safety.
Language: Английский